The Illinois Testers site is a free service provided by
VSI Environmental, Inc.

VSI is one of Illinois oldest and largest radon reduction companies.  We have been providing radon related services since 1987 with a 100% success rate with reducing radon levels to below the EPA limits.  VSI Environmental Service has mitigated several thousand homes across the northern Illinois area and helped pioneer the standards adopted in the Illinois law that regulates radon mitigation.

The company president, Keith Volsted, has been instrumental in developing new instructional courses in radon mitigation and testing for the University of Chicago and Illinois Department of Nuclear Safety to teach new individuals entering the radon field as well as continuing education and informational talks to realtors and associations.  Currently Mr. Volsted is helping the National Radon Safety Board (NRSB) in the development of course requirements in mitigation and testing.

Thank you,